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    ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE
    1.
    发明申请
    ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20200321540A1

    公开(公告)日：2020-10-08

    申请号：US16321642

    申请日：2017-08-09

    Applicant: IDEMITSU KOSAN CO. LTD.

    Inventor： Kei YOSHIZAKI ,  Toshinari OGIWARA

    IPC: H01L51/00 ,  H01L51/50

    Abstract: An organic electroluminescence device includes an anode, an emitting layer, and a cathode. The emitting layer contains a first compound, a second compound, and a third compound. An ionization potential Ip1 of the first compound and an ionization potential Ip2 of the second compound satisfy a relationship represented by a numerical expression (Numerical Expression 1) below. The first compound is a delayed fluorescent compound. The second compound is a fluorescent compound. The third compound has an electron mobility of 1×10−8 cm2/(V·s) or more. 0≤Ip2−Ip1≤0.8 [eV]  (Numerical Expression 1)

    ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE
    3.
    发明申请
    ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20190081249A1

    公开(公告)日：2019-03-14

    申请号：US16079328

    申请日：2017-02-24

    Applicant: IDEMITSU KOSAN CO., LTD

    Inventor： Masatoshi SAITO ,  Kei YOSHIDA ,  Yuichiro KAWAMURA ,  Toshinari OGIWARA ,  Kei YOSHIZAKI

    IPC: H01L51/00 ,  H01L51/50 ,  H01L51/52

    Abstract: An organic electroluminescence device includes an anode, an emitting layer and a cathode. The emitting layer includes a first compound and a second compound. The first compound is a delayed fluorescent compound. The second compound is a fluorescent compound. A solution of the second compound in toluene has an emission peak wavelength in a range from 430 nm to 480 nm. A molar absorbance coefficient of the second compound at an absorption peak closest to a long-wavelength side is in a range from 29,000 L/(mol·cm) to 1,000,000 L/(mol·cm). The second compound has a Stokes shift in a range from 1 nm to 20 nm.

    ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE
    5.
    发明申请
    ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20210074925A1

    公开(公告)日：2021-03-11

    申请号：US16982367

    申请日：2019-03-18

    Applicant: IDEMITSU KOSAN CO.,LTD.

    Inventor： Kei YOSHIZAKI ,  Toshinari OGIWARA ,  Yuichiro KAWAMURA ,  Masatoshi SAITO

    IPC: H01L51/00 ,  C09K11/06

    Abstract: An organic electroluminescence device includes an anode, a first organic layer, a second organic layer, and a cathode in this order. The first organic layer contains a first compound and a second compound. The second organic layer contains a third compound. The first compound is a compound represented by a formula (1). The second compound is a delayed fluorescent compound. The third compound is a compound represented by a formula (3). In the formula (1), X is a nitrogen atom or a carbon atom bonded with Y, Y is a hydrogen atom or a substituent. In the formula (3), X1 to X3 are each independently a nitrogen atom or CR1, Ar1 and Ar2 are each independently a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms and the like, and A is represented by a formula (3A), HAr in the formula (3A) being represented by a formula (3B).

    ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE
    6.
    发明申请
    ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE 有权

    公开(公告)号：US20210020846A1

    公开(公告)日：2021-01-21

    申请号：US16981945

    申请日：2019-03-18

    Applicant: IDEMITSU KOSAN CO.,LTD.

    Inventor： Kei YOSHIZAKI ,  Toshinari OGIWARA ,  Yuichiro KAWAMURA ,  Keiichi YASUKAWA ,  Kei YOSHIDA

    IPC: H01L51/00 ,  C09K11/06

    Abstract: An organic electroluminescence device includes an anode, a first organic layer, and a cathode in this order. The first organic layer contains a first compound, a second compound, and a third compound. The first compound is a compound represented by a formula (1). The second compound is a delayed fluorescent compound. The third compound is a compound represented by a formula (3). In the formula (1), X is a nitrogen atom or a carbon atom bonded to Y, Y being a hydrogen atom or a substituent. In the formula (3), n is 1 to 4, XB is a group represented by a formula (3A). In the formula (3A), Ar1 and Ar2 are each independently a monovalent or polyvalent aromatic hydrocarbon group, and Cz is a group represented by a formula (3B-1) and the like.

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